Improvement in processes for melting sugar



Y Vacuum' Pan.

` No. 12,719 Patented Apr. 1.711855.

" UNITED. STATES PATENT OFFICE.

CONRAD WV.. FINZEL, OF BRISTOL, ENGLAND.

lMPROVE-MENTMIN PROCESSES FOR IVIELTING SUGAR.

Specitication forming part vof Letters Patent No. 12,719, dated April 17, 1855'.

To all whom it may concern:

Be it known that I, CONRAD WILLIlrM'FiN- ZEL, of Bristol, in the county of Somerset, sugar-renner, have invented an Improvement `in Refining Sugar; and`- I do hereby declare that the following isa full and exact descriptionV thereof, reference bei n g had to the accompanying drawings, and to the figures and letters thereon. i

Whereas, it has hitherto been the practice to melt raw sugars by means of steam inject` ed into the pan containing the same, or otherwise in open pans, whereby much fuelisconsumed, a lai-ge proportion of treacle is formed,

while from such melting the sugar becomes colored.

Now, my improvement consists in melting sugars 'in vacuo, wlierebya much less quantity of treacleis produced, and the sugars are of a better color than those melted in the ordinary manner.A i

For the melting of sugars I adapt an ordinary vacuum-pant() my purpose by-iitting or providing it with a gage or test apparatus whereby to ascertain the state of theclarification at any timeof the operation. A vacu- `um-pan without any addition might be emv p'loyed; but thenv the cover of the man-hole would have to be removed in order to ascertertain the state of the working, whereby the vacuum would be destroyed and great i loss Would be liable to be incurred from the sugar l being drawn over with the air on re-forming the Vacuum. By melting sugars in 'vacuo the melting takes place ata much lower temperature than by any of the processes now followed.

The sugar is not liable to damage from heat, as it is not long in contact therewith, anda great saving of fuel and time is effected.

In the drawings annexed I have representcd a Vacuum-pan and test apparatus adapted to the purposes ofv my invention; but I do not In witness whereof I, the said CoNRAD WILLIAM FINZEL, have hereunto set my han this 3d day of November, 1854. A

`CONRAD WM. FINZEL.

. VVVitnesses:

R. A. BRooMAN, ALEXR Sr-IARio,

Both of Patent Oycc, 166 Fleet Street, London.` 

